Table 4.

Associations of the individual criteria with SOFA scores, PSI, hospital LOS and costs (mean ± SD, n = 3974).

Criteria	SOFA score/PSI/hospital LOS (days)/cost ($)	t Value	p Value	rs Value	p Value
Respiratory rate ≥22/min	3.59 ± 1.58 vs. 0.73 ± 1.49	12.739	<0.001	0.675	<0.001
	117.46 ± 6.25 vs. 58.71 ± 3.93	11.361	<0.001	0.604	<0.001
	15.3 ± 7.3 vs. 10.5 ± 4.2	4.847	<0.001	0.316	<0.001
	2015.56 ± 937.35 vs. 766.43 ± 316.74	9.305	<0.001	0.492	<0.001
Altered mentation	5.24 ± 1.37 vs. 1.34 ± 1.82	11.694	<0.001	0.618	<0.001
	130.98 ± 9.14 vs. 73.69 ± 5.27	10.703	<0.001	0.539	<0.001
	16.9 ± 8.1 vs. 11.7 ± 6.3	4.312	<0.001	0.298	<0.001
	1512.08 ± 813.71 vs. 1175.38 ± 651.08	5.493	<0.001	0.292	<0.001
SBP ≤100 mm Hg	2.64 ± 1.79 vs. 1.56 ± 1.92	4.613	<0.001	0.309	<0.001
	96.49 ± 6.01 vs. 76.00 ± 5.04	3.279	<0.001	0.204	<0.001
	14.3 ± 8.35 vs. 11.8 ± 1.17	3.295	<0.001	0.217	<0.001
	1412.98 ± 605.11 vs. 1167.13 ± 573.19	3.014	<0.001	0.195	<0.001

SOFA: sequential organ failure assessment; PSI: pneumonia severity index; LOS: length of stay; r_s: rank correlation coefficient; SBP: systolic blood pressure.

The data in longest cells indicated SOFA scores, PSI, hospital LOS and costs, respectively.